Dead Babies (2000)

A group of wealthy bohemians clash with each other as they're targeted by a gang of murderers. Upper class bohemian Giles (Charlie Condou), whose biggest worry in life seems to be the state of his teeth, has inherited a large estate from his family, and one weekend he invites large group of friends to join him for a weekend of drug-fueled debauchery. Ennui-stricken Cecilia (Olivia Williams), her hulking boyfriend Andy (Christian Solimeno), high-strung Quentin (Paul Bettany), his spouse Cecilia (Alexandra Gilbreath), hygiene-challenged Keith (Andy Nyman), unstable Skip (Kris Marshall), man-hungry Roxanne (Hayley Carr), drug-dealing Marvel (William Marsh), and Lucy (Katy Carmichael), who has been involved with most of the men in attendance, all settle in for a few days of conversation, free love, and good not-so-clean fun. But the revelers are unaware that the Conceptualists, a murderous terrorist organization, have staked out the mansion, and soon they're receiving messages from someone called Johnny, who makes clear his intentions to kill them all.